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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e58588c200cd74b271b9bfdcc6f4335f57634556f1936e4239e8d92a15bad86' 
  AND token = 'UGNbePKO9VzgNQSl5iM6iHTTctZ8X8dNch2LJn5p6GA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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