Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c61506997c04555be00ef73532bb550be1660e2465e5f20fae4b26b6e20d9b99' 
  AND token = 'srAPcLWHSb3TvPmr1kT+HMxGmohqvcciXRbfARwPDXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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