Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c95fcf393e47d4fc62a1fb720d06e162e4ea53439c3737a521c491aa2436e2fa' 
  AND token = '+X7ck3Q1oTYBGcxOYmfq6bGt6Tc2JPaX49P5qw2tWeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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