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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '173ac1b1c48bb33542271261619538ea7ce3de5aad580fad36a1ce0c16f9c864' 
  AND token = '27xxYE7UNRN82laPniNAHQsYdsRLpP1G6/SfSQITmPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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