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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa43bd78a7eec85522255ae08a5b7613c060b74f67658f3571cc0d40b474632' 
  AND token = '/HAtGW0f9UdW5X73qp30QIEr7BJoLJdsuVSCLjpcJu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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