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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4592becd88fef06fcbe6a8f70eb8ed4082f1f976f81bcadade055af27df6ccb3' 
  AND token = 'NZA3Rbpavb4sRSUWQzqiMMlCUqPs3vpuUrqbWp1vuvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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