Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e39093101fcc622e45e021f62480f27cb10fa57027ac37604ee1613f3967ad8c' 
  AND token = '1biiiSpMMVaexXD2c7AGJerBBJauOxeZ9/c9dB+70ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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