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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61841c4f4dc981de9be5a71d7877e3a016583881094f400655426ade6a72f084' 
  AND token = 'bBEhFCl2XlYgQ6ulyHP99cyc8NyY+z7WBdbzgUVUe4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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