Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1cc700a9d405889b1b9da63e550bed38039fc8271a5e7ae249f9a3c87da2ecb' 
  AND token = 'sFBRZ7YrVowfGLVtRhiVKyRJndMm1fo0a/AGeqAoaBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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