Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec4d85251abe2622a19185a212ad35220c2c4236be4b1a9798c01c1e2d535696' 
  AND token = 'QjLNi6hpg4La4teFv5facdzGSVB9Q1YbUQC8ot51Up0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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