Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecf50491eb74b7531d3bf7be83232ffd836bf70966d798770eaa0b967b34db74' 
  AND token = 'bsPfVRwWBIqJWeRzo027tNsfJd+7TNgAluOf42tIBnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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