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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee65e83008ea86a144686e7315aa896b452bb62b9e7ae757321615d9f0cc1783' 
  AND token = 'iihxOOL1W2Y6h6sZXgl3Fd5EyGe2804DIlAFM5lJ9I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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