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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86657d3f8f2767d4cfe8d8bed52a56e86d756576c71d7fbfe40d08899afe68f7' 
  AND token = 'uIj5IuzL1lDDtnSnnckW3/WRRzS5Vs93rbkLBGuTdr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}