Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5401f8e4145faa9fdc140bb12d2b59da7f6624e4caa15f1c03f33ca030c5e764' 
  AND token = 'g7hV3DOtR4m2KSoDB5w3PSNIIGmIyPWi1QQxViQwTKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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