Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bc86ab1d70c58d109392d3ed19c1a29c331c633a9a7abd20a0269196cd6832b' 
  AND token = 'H3mbcF07d8CL/2OZCRoxYcP2Sr6RS8PgEO4FxTbA5NQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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