SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '962f6441d392f9ad659a002dc07dbbc477976795fbb54ffa18a5968d7fd10223' 
  AND token = '1fskbc2dvHAIbgZhUzOVvvXUENTSvoBh4Fg+BlZC/o0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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