Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2934754cb628c5c83eae39ca5fcdd7ba6aee5aa64e07d7342f09a93f34b53c8' 
  AND token = 'gv6AVAystRs4GaOZZErWZdhic0X2B6nRSAIQM9s7jY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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