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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22e5ea29325f5741f6ae3851d96d3ddb88db6256d78b45132dab36a8eb54507c' 
  AND token = 'YkACf2JUwcM9xnukT4Oo8/3Usd06f7nM7KYU1+Em7e0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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