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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b222fd8eb3ec8c5284c233ec60df9683fdbf040da2651a86ae3dd32efa724594' 
  AND token = 'p/d95sQV5A5ekAnL9ZrrSw5AyS7lGHkzogKKI/RHYl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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