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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4421a8bd205ab8efb74f7e94e55ea5966e48d9e554d53f7f63bdd564c68f9595' 
  AND token = '9XeBrEYyX7u4tCVgzS93biTrdGU8bTQy0gfsGqJlNok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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