Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a631cd1d0c9c1c1c8b2f03b5a978d5095fb5e47a9df32a135166865a3fda5d18' 
  AND token = '/59zft1KxNkWPUQhyECnwyuvPy4P9/91QmuRNAgqQu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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