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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e52f6c857c89f8da856b0985ad00e6915e60d64c4bc2e94f60151b9d72db1ae' 
  AND token = '8Xyiz6xS+wd7K/rR1AgtJVvi7AmwbBmRQMWvgSS+H0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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