Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9fc212d3cf8b62cb90209f1d5a175079027d11ecc962df63d28cc072bc35cac' 
  AND token = 'dhPJtbUehgzD6dJCST3mUHOEaDhEevycVomCZiO/ZDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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