Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '121363439d28633e1b24a75b85930133d52c9712afe847aeb415015991a1898c' 
  AND token = 'omIxMc8Upa+0b8IVGf/aBNdmQt30c4UkjwAeU5IVGb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}