Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28e5e9274281f0ca933cb119ace5bc40d27268219a03e684a2be0f059fa06eff' 
  AND token = 'kUWgwzieQM607SrGhZdh4zGla/brlKnz80BaJSOVKDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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