Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb1f20953e5b674e326fce7cd91cfd56cf985863375494dac01cac1d5e29a1da' 
  AND token = 'mOAp7r4rF3GKIwwUx+NLq9zmbbri6arCa+G6oQYbthM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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