Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e5086c2cb03024f40335bfd27d65c4e45bcff9851587374e48e4f4c9bea816' 
  AND token = '8vTJN2DeU6cdpk/adkyBVZMhEC1c9rPImbgoT6XsTLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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