Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b9d0822e96077e757dc1ef6bac2f6c40bd5883eadad023ccaf279c87b60a6df' 
  AND token = 'V/o1miF8yMhrqMSpIDCpaUNaEXvMR0LDVoXlZpfiP/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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