Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0be52b8562abd086c773cea34599706fdefb4a30e96f95957be76e3fe21130e' 
  AND token = '99ayKL/7OE3iZFUcfLEeoxXNPtLjkQCD7fsLM9+VPo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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