Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d944b78cece08c5b3fa3e7ceafef4fd547df8eff1af1a1dc0bba5c735fe6b98' 
  AND token = 'r1JYSp/fHG9mxQagXEG4mWCfxxYYkpYwX3X5gQiK78g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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