Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eea8352bf6c094e783bd4bbbea55712305d5e8243eb00f28a522a75f4765ef94' 
  AND token = 'hUv2HnA4JFaq+Lga/XjcS+oMg9621jHa5Ug66e9Y14k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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