Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07eb1fb0dd5e524a54173c99594f5016ffc2e4e12b03b748876ff3fcd0cafa6e' 
  AND token = 'qkzUj76Wcap/WVWQtTnocfly8eQlkM0lYceI2vEZ9Kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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