Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd3a74f4b1c42eb01bb623befeb956abfd3d01ef751ba4993ff083b3713a902a' 
  AND token = 'AVXq8F4s29aThh2XD3rF5FikC7HyXpXgqYqB7g9o1Fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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