Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a28b0b5bceab2235256e96d08ef1b4e852853fa1efa315222ee1354a3bc32a10' 
  AND token = 'RjupfEEQ30XkXlAkwoHlB6z9xuUMcU6MGVl+0WiKfl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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