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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '943ccd2cf271ede8fa2ad4ba001bcc8d28ea51b24edf522d4c92728ac627b7fa' 
  AND token = '+8YgZqiSOKns0SV1h5b/wU/0sIZ9J4UFy44pWW8Q31A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00083

JSON explain

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