Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1bb51671f025fd839126f2322859dc119b16b3ac80879ed88be1ed9fcbe7b59' 
  AND token = 'F8ppMXPEmO9O07qc1j1xzusyMEnMj5uJZFKkPkDuPlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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