Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dafb62dc1c13a958e0ac18f8374b2bb25a3b66d01472c1cce145caeb13a9297a' 
  AND token = 'BfW7F7er9VIvmxqqDqOmb7LacDuk2EcD4iol5zKMZcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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