Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f8b32c9bdb4ee194ce8de83f0fadd13e37feafe2bc607200f6e01bee7f3c8ac' 
  AND token = 'j/aXg/Ln5dL7IPOReKhcztwC/EfcKxE/n0IAZdK5kKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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