Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '351a42f6ed52dda26a0dec5fc0a817bd09a7978596be877cd198745d918aaf8b' 
  AND token = '+TMC7dQs2A3dfRJRf88TPTCv7oTi0eBAqFZx2dgGGXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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