Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d62a12c591da4524660117ce4d4588af409035a0260280850e3c2eb7972a851' 
  AND token = 'aRB7RDswTiLuxUyD1EwpbPkMLq3B4mnTdLgvCd/+6mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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