Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c14b84a096c0de587bc1c3f37107cb75ca32245666be88d8fd09592fde62102d' 
  AND token = 'LWldE8F+hoZAyWDpjoBlkebCv/eZcBJih2p1EjmAoL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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