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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd545022c2192897cfdea21f62f4334adff3baf065e67a70ab85174f4fafc22a4' 
  AND token = '8iF692xI7l+qy7mvKSxhWV+2LbT8b8J+36ujqcfNkhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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