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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23070ea02f2c56b5b465e1f24e62130ecbf6c0bfda355bda35caf54363124d30' 
  AND token = 'dMFCVoyoY6iOmIwjJ7/9rNccids6ibLFgzOjbE4ozgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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