Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7acbea3b66cf7eaa64d3a7edceb7d01c53814ec65364c337e1a4970fc3e4ffe6' 
  AND token = 'F18vPmBx7LfTstAlbJL6KuY1FAfUbfG4dpqNv2QSOj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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