Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb39d210e9e3ad9e909507686b854690283ce3620d31ef2f55b6ec997e7e4d22' 
  AND token = 'wmP4D+c41DPK3z5tY/BcLnwRuk5oHTXfFJpE3Tvh/ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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