Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd1cb75b754e64731366cfe5a7aa1018b86262876fc5295830976ceee2535981' 
  AND token = 'aYWWS9bcYCMrM2eeXV28DrXInLix6pipJi3iWT4b1zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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