Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e01d769882e84d585eebe19e977f1d35fe9e75fe902bf93ce2fad2b897a65932' 
  AND token = 'SFbs6lDQFnvRRpVoH5inlnKpkgtgp4uNu60netyJ+UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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