Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c18e1f1ac4abe14572659ee11ca6cfd4ad3fba56641d3a9350d28783d364770e' 
  AND token = 'Ef9tYZURtmeDo6Qa6e2M6nT21GSZyNRUky+GQRbWgjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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