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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ae505e0699ae29a30407e813fad5933207d446453459f359cec24bfe39e8c33' 
  AND token = 'c67v4Z1Ir5yTvXKLwcgLio7x0S3pnn53qTdFSYuFYYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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