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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fe5fffbdfeb69be47fe46f747ca17194452c75c9e1bca83433c0e068ee70085' 
  AND token = 'O1yW+5rt607tMSBE16nqhJX3jdjaW56HYWE1+4Vui60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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