Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb2a29b7ec80f22c10df497d6d4a0c86cbd6e804bf2280d39819b0a8ad39f59' 
  AND token = 'yuHB7BWVrmvnQjYSx/u4oJB0P7mn4AUsttkNyALgGDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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