Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8effc7fae7a3a37e841342f769a7051481f4d77748918dbac3b8715ecc725903' 
  AND token = 'o0Lx/Ptyvy9MDzxa6aCEQ3+8nNavCxeR1NIMN7e8Qdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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