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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c601a0fcc55b301ff51f2407680894ec8f70a4af6aa8dcd84ef2ffd40c4b9691' 
  AND token = '2dH7rC8xWDyK7GzPxbJKyutpDfRDLZy9e9UG8TdUgVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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