Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c541c901024d6172a08b78dfa5a2994aa4d058e7045b6a9171a6e932a50d024' 
  AND token = '7VBpvhjBQGgvNpOApHuJ8Nhs9fadMmBxPs5pTP72YKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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