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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005f2240150ecf66669f3de696447fd11df4a4960c3b7067042226cf55b090ee' 
  AND token = 'aeH/6il8qjcm8mYzTDLSIE76u11t1gCw4fRIqCCAzGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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