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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '153e9e645e6175542da5ef3b46aa8696c3ceaabc855c8975f7ab56cfef1bfc4b' 
  AND token = 'WZt69+Uatdc3IDVSteaK98+kkoHCfd8k3fxZkxw8TLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}