Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8447ee620270f724dbe304c2b387b8fd50d93e9439f4efcc8206817e9e02599d' 
  AND token = '9uplCs/EBBwFBjJLDY7IE3oZbSs0cnw9a8AdhGkRDPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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