Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cfb3e88d698d6019d8ba1c22093c95475bfefc6908b00ce6bb098ad40abfdf4' 
  AND token = 'VpjlIR+03CJyJVAJmD2m/t3HBACahWkqbmUNhP7RO90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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